Matches in SemOpenAlex for { <https://semopenalex.org/work/W2511408557> ?p ?o ?g. }
- W2511408557 abstract "We present a microscopic investigation of how the magnetic domain structure in ultrathin films changes after direct excitation by single ultrashort laser pulses. Using photoelectron emission microscopy in combination with x-ray magnetic circular dichroism in the resonant absorption of soft x rays, we find that individual laser pulses of $ensuremath{approx}60phantom{rule{4pt}{0ex}}mathrm{fs}$ duration and a central wavelength of $800phantom{rule{4pt}{0ex}}mathrm{nm}$ lead to clear changes in the domain structure of a Co layer of three atomic monolayers thickness in an epitaxial Co/Cu/Ni trilayer on a Cu(001) single-crystal substrate. A relatively small enhancement of the sample base temperature by 40 K is sufficient to lower the threshold of laser fluence for domain wall motion by about a factor of two. Pump-probe measurements with a laser fluence just below this threshold indicate that the laser-induced demagnetization of the sample is far from complete in these experiments. Although the domain wall motion appears similar to thermal domain wall fluctuations, quantitatively it cannot be explained by pure thermal activation of domain wall motion by the transient rise of sample temperature after the laser pulse, but it is likely to be triggered by a laser-induced depinning of domain walls." @default.
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- W2511408557 date "2016-08-11" @default.
- W2511408557 modified "2023-10-06" @default.
- W2511408557 title "Movement of magnetic domain walls induced by single femtosecond laser pulses" @default.
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- W2511408557 doi "https://doi.org/10.1103/physrevb.94.054414" @default.
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